When trying to open Active Directory on a Microsoft Small Business Server 2008 I was greeted with a nice error message saying -
“Error Microsoft Visual C++ Runtime Library Error ” I then clicked OK and got a MMC snap in error and no Active Directory!!!
To fix this you need to browse to:
- Logon As the user who is having the problem
- Browse to: c:Users%username%AppDataRoamingMicrosoftMMC
- Look for a file called ”DSA” and rename it “DSAOLD”
- Now try and open Active Directory again and all should be fine









Just open up MMC by itself by going to
START
RUN
and typing MMC in the run dialogue box and hitting OK.
Now that MMC is open, go to
FILE
OPTIONS
Switch to the DISK CLEANUP tab.
Click on the DELETE FILES button
Answer YES to delete them.
Then hit OK.